Heterozygous condition may produce imbalances in the amounts of gene products similar to those produced by extra gene copies.

TLS Online TPP Program

#Id: 4780

#Unit 5. Developmental Biology

Wnt pathway is critical in establishing the anterior-posterior axis of C. elegans.

TLS Online TPP Program

#Id: 4781

#Unit 5. Developmental Biology

The P2 cell is also critical in giving the signal that distinguishes ABp from its sister, ABa

TLS Online TPP Program

#Id: 4782

#Unit 5. Developmental Biology

ABa gives rise to neurons, hypodermis, & anterior pharynx cells ABp makes only neurons and hypodermal cells

TLS Online TPP Program

#Id: 4783

#Unit 5. Developmental Biology

ABa and ABp are equivalent cells whose fates are determined by their positions in the embryo (if one experimentally reverses the positions of these two cells, their fates are similarly reversed and a normal embryo forms)

TLS Online TPP Program

#Id: 4784

#Unit 5. Developmental Biology

In an unperturbed embryo, both ABa and ABp contact the EMS blastomere, but only ABp contacts the P2 cell.

TLS Online TPP Program

#Id: 4785

#Unit 5. Developmental Biology

The P2 cell produces juxtacrine protein APX-1(a Delta homologue)